Chimney-cowl.



CHARLES WALTER MAGWILLIAMS, OF GENEVA, NEBRASKA.

CHIMNEY-COWL.

I Specification of Letters Patent.

Patented Feb. 19, 1918.

Application filed April 4, 1917. Serial No. 159,666.

To all whom it may concern:

Be it known that 1, Crrannns lVAL'rER NlACl/VTLLIAMS, a citizen of the United States, and a resident of Geneva, in the county of F illmoro and State of Nebraska, have invented a new and useful Improvement in Chimney-Oowls, of which the following is a specification.

My invention'is an improvement in chimney cowls, and has forits object to provide means in connection with pivotally mounted cowls adapted to be swung by the wind to discharge the smoke in the same direction toward which the wind is blowing for automatically controlling the draft through the cowl in accordance with the speed of the wind, wherein a damper is provided normally counterbalanced to stand in open posi- 1 tion, and having a vane connected therewit and mounted to be engaged by the wind to partially close the damper when the wind blows to lessen the amount of draft.

In the drawings Figure 1 is a vertical section through the chimney extension and the cowl, and

Fig. 2 is a section on the line 22 of Fig. 1.

The present embodiment of the invention is shown in connection with a chimney l of ordinary construction. the said chimney having a metal extension 2, whose upper part is cylindrical, and the said extension has an external rib 3 near its upper end. The cowl consists of an elbow consisting of arms a and 5, and the arm 4: its over the upper end of the extension, and engages the rib. The lower end of the cowl is reinforced as indicated at 6 by bending the said end back upon the body and it is this end that engages the rib.

The cowl is pivotally mounted by means of a journal rod 7, which passes at its upper end through a bearing 8 at the axis of the arm 4L of the cowl, and through spiders 9 and 10 mounted in the arm 4 and in the cylindrical portion of the extension respectively.

A nut 11 is threaded on to the upper end of the rod and the nut is locked by a cotter pin as shown. Other nuts 12 are threaded on to the rod above and below the bearing of the spider 10 to prevent upward movement of the rod with respect to the exten- The cowl has the usual vane 13 for constraining the cowl to follow the direction of the wind. The vane is so. arranged that the opening or outlet of the cowl will be in the direction toward which the wind blowing, and the mechanism for controlling the draft through the cowl is'controlled di rectly by the force of the wind. The lower part ofthe outlet of the cowl is flattened as shown at 14: inFig. 2, and a damper 15 is mounted at this point.

The damper is provided with a sleeve bearing 16 which is engaged by a pintle or shaft 17, journaled in bearings-l8 in the walls of the outlet and having stop collars 19, for limiting the longitudinal movement of the shaft. The shaft or pintle is rigid with the damper, and at one end the shaft has a depending arm 20, which is pro-- vided at its lower end with a weight 21.

A vane 22 of approximately trianguhir shape is mounted on the arm above the weight, the vane having a central bearing 23 for receiving the arm; weight, and the arm are just enough heavier than the valve ordamper 15 to normally hold the same in the full line position of Fig. 1.

The vane is however far enough lateral with respect to the cowl that it will receive practically the full force of the wind when it is blowing, and since the vane 13 will always cause the cowl to take a position in line with the direction of the wind and with the outlet away from the wind, the wind will always act upon the vane in a direction to cause it to close or partially close the damper. Thus when the cowl is in the position of Fig. 1 with the wind blowing the valve 15 will be closed to an extent determined by the speed of the wind. The extent of opening through the cowl and as a consequence the draft through the cowl will be directly controlled by the force of the wind.

I claim In combination with a chimney, of a cowl journaled on the chimney to swing with the wind on a vertical axis and having a The vane, the

horizontal discharge portion, and mean for constraining the cowl to swing with its discharge end away from the wind, a damper hinged within the horizontal discharge portion to swing into a Vertical position across the outlet or intoh01'iz0nta1 position resting on. the -b0tt0m of the horizontal porconles of this patent may be obtained for to move the damper into closed or partially closed condition in accordance with the 4 force of the wind, said vane being weighted to normally hold the damper open.

CHARLES WALTER MAGWILL.AMS-

five iclentieachi y'addressing the Commissioner of Patents,

Washington, D. C. a i' 

